Improvement in wood-boeing machines



geiten gieten gutem @frn Letta-8 11mm No. 75,103, ma Maat s1, 1868.

t IMPROVEMENT IN Woon-BORING MACHINES.

@tigt tlgttnlenfrmt it in tlgrtrttett tant mit making gaat tf its samt.

T0 ALL WHOM IT MAY'CNOERN:

Be itl known that 1, ALMON RGFF, of Southport, in the county vof* Fairfieldand State of Connecticut, have -invented a new and useful Improvement in Circular and Ornamental Cutters; and I do hereby declare that the following is a full and exact description thereof, reference-being had to the accompanying drawings, and to the letters of reference markedthereon.

My in'vention or machine is intended principally-for carpenters and other mechanics who have occasion to cut circles or curves in Wood,especially foro'ruamental purposes. My invention consists of one or more cutters upon` a lrotating armor arms'provided-w'ith a central. screw for fixing and holding-such rotating arm, and also provided with a feedindependentof the rotation of the cutters. In the accompanying drawings- Figure 1 is a. side view. or elevation of mymachine.

Figure 2 is a 'nep view of the same.

Figure 3 is atransverse section through the.centre of the machine.

Figure 4 is a detached view of the washer used forv setting the central screw in a perpendicular tothe surface tobe cut. l

Figures 5 and 6 :ire detached views of the cutters and knives.

In the construction'of my machine a central iserew, H, is made with two screw-threads, as secn'in g. 3. The screw-thread at the lower endis very coarse, and intended toscrew into the piece of wood to be cut, and thus tix the machine stationary.` A loose washer, N, is laid uponuthe surfaceof the wood, in orde'r to secure the perpendicular position of the central screw, The upper and .ner thread of this centralserew is provided with a tubular nut, K, which is rmly connected to the crank L for the purpose of feeding, as 'will be hereafter explained, The vtwo arms A and A are made inone piece, and provided with a tubular collar, I, as shown in figs. 1.and 2l'. The arms have slots D and D/and slides B and Brfor adjusting and holding the cutters C and C', as seen in figs.` 1 and-2.' The' cutters may be of various forms, according to the werk to be done. lwo of these forms are represented in iigs.1, 5, and 6. For cutting circles the arms are locked. to the nut K' and crank L, by means of a sliding bolt, M,.igs. 1 and 8, and the operator takes hold of theihandles E and E and turns'the arms and cutters constantly in one direction, the cutters being thus fed down upon the central screw as the work proceeds. vIneutting parts of circles,tth e right-hand cutter, Egal, is removed, and the left-hand cutter isv employed alone. Inr this operation the arms are not locked to the"feednut and crank, and the crank is occasionally turned to'give the necessary feed, while this 4single Acutter is worked back (and forth instead of being revolved.` The central screw may be fastened by being driven into the wood, or by being passed through the'board and hold by a nut'or by a flange fastened by wood-screws or byany other proper means.

My machine willporform a great variety of work, circular, ornamental, and inlaying.

Having tliusfully described my inventionrwhat I claim, and desire to secure by Letters Patent 'of the United States, is; f

In combinationv witha central stationary screw or shaft, the feed-nut K, whether lockedrto the rotary arms, or operated by the crank L, constructed to operate substantially asset forth.

ALMoN nerr.

Witnesses:

Y DANIEL BREED,

'EDMJIX BROWN. 

